PROCESS FOR RECOVERING SULFURIC ACID FROM METALLIC SULFATE-CONTAINING WASTE SULFURIC ACID

摘要

In order to efficiently and easily recover a spent sulfuric acid exhausted, for example, in an acid washing liquid or in producing titanium dioxide by a sulfate method in a large amount, as highly concentrated sulfuric acid, bivalent iron ions in the spent sulfuric acid containing metal sulfate are first oxidized into trivalent iron ions, hydrochloric acid is added to such a liquid and then solvent extraction is carried out. <IMAGE>